Akousti-Liner™

A flexible duct liner providing both thermal and acoustical insulation, made from inorganic glass fibers bonded by a thermosetting binder. It’s offered with or without edge coating to seal fibers. 

Applications

Certifications
Product Features
Versatile
Akousti-Liner is designed to work with all types of ventilation ducts. The airstream surface is faced with a black mat bonded to the insulation blanket.
Thermal & Acoustic
Akousti-Liner is useful both for creating more energy-efficient spaces, as well as for absorbing sound to reduce unwanted noise.
Sustainable
Akousti-Liner is made with our bio-based ECOSE® binder and is formaldehyde-free. It’s also made with at least 50% recycled glass.
Product Details
Technical Data
TECHNICAL DATA
PROPERTY (UNIT) TEST PERFORMANCE
Corrosiveness ASTM C665 Does not accelerate corrosion of steel
Corrosion ASTM C1617 Pass
Maximum Service Temperature ASTM C411 450° F (232° C)
Maximum Air Velocity ASTM C1071, UL 181 Erosion Test Max. 6,000 ft./min. (30.5 m/sec.) Tested to 15,000 ft./min. (76.2 m/sec.)
Water Vapor Sorption (by weight) ASTM C1104 Less than 3%
Mold Growth ASTM C1338, ASTM G21, ASTM G22 UL 2824 Pass
Surface Burning Characteristics (flame spread/smoke developed) ASTM E84, UL 723, CAN/ULC S102 UL/ULC Classified FHC 25/50
Thermal Performance
THERMAL PERFORMANCE | ASTM C177
MEAN TEMPERATURE 75° F (24° C)
DENSITY THICKNESS C-VALUE¹ R-VALUE²
BTU/ FT2 · HR · °F W/ M2 · °C FT2 · HR · °F/ BTU
1.5 PCF
(24 kg/m³)
1" (25 mm) 0.24 1.42 4.2
11/2" (38 mm) 0.17 0.97 6.0
2" (51 mm) 0.13 0.74 8.0
2.0 PCF
(32 kg/m³)
1/2" (13 mm) 0.48 2.73 2.1
1" (25 mm) 0.24 1.36 4.2

¹ The lower the value, the better the performance.  

2 The higher the value, the better the performance. 

Acoustical Performance
ACOUSTICAL PERFORMANCE | ASTM C423, TYPE A MOUNTING
DENSITY THICKNESS FREQUENCY
125 250 500 1000 2000 4000 NRC
1.5 PCF
(24 kg/m³)
1" (25 mm) 0.18 0.28 0.73 0.85 0.91 0.90 0.70
11/2" (38 mm) 0.23 0.50 0.87 0.92 0.93 0.93 0.80
2" (51 mm) 0.37 0.76 1.02 1.00 0.98 0.92 0.35
2.0 PCF
(32 kg/m³)
1/2" (13 mm) 0.10 0.17 0.43 0.59 0.73 0.75 0.50
1" (25 mm) 0.25 0.35 0.69 0.89 0.96 1.01 0.70

 
Friction Loss
FT./MIN. HYDRAULIC DIAMETER
VELOCITY 10" 16" 24" 32" 40" 72" 100"
500 0.054 0.030 0.018 0.012 0.009 0.005 0.003
600 0.077 0.042 0.025 0.018 0.013 0.007 0.004
700 0.104 0.057 0.034 0.024 0.018 0.009 0.006
800 0.134 0.074 0.044 0.031 0.023 0.011 0.008
900 0.169 0.093 0.056 0.039 0.029 0.014 0.010
1000 0.207 0.114 0.068 0.048 0.036 0.018 0.012
2000 0.806 0.443 0.266 0.186 0.141 0.069 0.046
3000 1.797 0.988 0.594 0.415 0.315 0.153 0.103
4000 3.179 1.748 1.050 0.734 0.557 0.271 0.181
5000 4.952 2.724 1.636 1.143 0.867 0.422 0.283
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